Comfortable anti-off sock and knitting method thereof

ABSTRACT

The present invention provides a comfortable anti-off sock, using a circular knitting technology or a weft knitting technology, and the sock includes: a sock toe, a sock body and a sock heel; both the sock toe and the sock heel are connected with the sock body; wherein the sock heel includes a first picking-needle area and a first inserting-needle area located at one side of the first picking-needle area near the sock toe, the first picking-needle area links the first inserting-needle area, and a plurality of first inserting-picking-needle areas are located between the first inserting-needle area and the first picking-needle area; and the first inserting-picking-needle area includes a second inserting-needle area located at an end of the first picking-needle area and a second picking-needle area located at a side of the second inserting-needle area, both the second picking-needle area and the second inserting-needle area link the first picking-needle area.

CROSS-REFERENCE TO RELATED APPLICATIONS

This Non-provisional application claims priority under 35 U.S.C. § 119(a) on Patent Application No(s). 201711260473.5 filed in People's Republic of China on Dec. 4, 2017, the entire contents of which are hereby incorporated by reference.

BACKGROUND OF THE INVENTION Field of the Invention

The present invention relates to a knitting field, and more particularly, to a comfortable anti-off sock and a knitting method thereof.

Description of the Related Art

In order to adapt to foot wearing, a “line-heel” or “Y-heel” technology was often adopted when a sock heel of a conventional sock is knitted. That is, a corresponding knitting structure is formed by a picking-inserting-needle knitting method along the “line” or “Y”.

However, the following problems still exist in the prior art and technology: (1) due to the condition of using the existing hosiery machine, the normal range of the picking-inserting stitch number of the sock heel is about one-seventh of the stitch number of the needle-cylinder, and too few stitches cause the sock to fall off easily, while too many stitches lead to the sock heel to be too sharp and not to fit the foot type on wearing; (2) under the condition that the conventional “line heel” meets the basic requirement of wearing comfort, the knitting length of the sock heel is limited by the equipment condition, and the sock heel part is still hard to achieve a desired shape; however, a bifurcation part angle of the “Y heel” can only be about 45°, if the size of the sock heel is enlarged, the sock cannot achieve the good anti-off effect due to the angle limit; and no matter it is a “line heel” or a “Y heel” sock, parts of the sock heel surface of the sock wrinkle easily and have obvious protrusions, which affects the wearing; and the foot surface part is also easy to wrinkle after wearing because the foot sole size and the foot surface size have not much difference.

BRIEF SUMMARY OF THE INVENTION

Aiming at above problems, the present invention provides a comfortable anti-off sock and a knitting method thereof to solve the problem that the sock is easy to fall off and parts of a sock surface easily wrinkle in the prior art.

A technical solution adopted by the present invention is as follows: a comfortable anti-off sock, using a circular knitting technology or a weft knitting technology, includes: a sock toe, a sock body and a sock heel; both the sock toe and the sock heel are connected with the sock body; wherein the sock heel includes a first picking-needle area and a first inserting-needle area located at one side of the first picking-needle area near the sock toe, the first picking-needle area links the first inserting-needle area, and a plurality of first inserting-picking-needle areas are located between the first inserting-needle area and the first picking-needle area; and the first inserting-picking-needle area includes a second inserting-needle area located at an end of the first picking-needle area and a second picking-needle area located at a side of the second inserting-needle area, both the second picking-needle area and the second inserting-needle area link the first picking-needle area, and the second picking-needle area and the second inserting-needle area in a last first inserting-picking-needle area link the first inserting-needle area.

A plurality of first inserting-picking-needle areas are knitted between the first picking-needle area and the first inserting-needle area, so that the sock heel part forms an “arc-shaped heel” structure, which increases the loop-forming number of the sole, prevents the sock from falling off and sliding, and enhances the wearing wrapping performance and comfort of the sock.

A further improvement of the present invention is that, the sock heel may further include a first adding inserting-needle area located at one side of the first picking-needle area away from the sock toe, and the first adding inserting-needle area may link the first picking-needle area.

A further improvement of the present invention is that, the sock heel may further include an adding picking-needle area located at one side of the first inserting-needle area near the sock toe, and the adding picking-needle area may link the first inserting-needle area.

A further improvement of the present invention is that, the sock toe may include a third picking-needle area and a third inserting-needle area located at one side of the third picking-needle area near the sock heel, and a plurality of second inserting-picking-needle areas may be located between the third inserting-needle area and the third picking-needle area; and the second inserting-picking-needle area may include a fourth inserting-needle area located at an end of the third picking-needle area and a fourth picking-needle area located at a side of the fourth inserting-needle area, both the fourth picking-needle area and the fourth inserting-needle area may link the third picking-needle area, and the fourth picking-needle area and the fourth inserting-needle area in a last second inserting-picking-needle area may link the third inserting-needle area.

A further improvement of the present invention is that, the sock toe may further include a second adding inserting-needle area located at one side of the third picking-needle area near the sock heel, and the second adding inserting-needle area may link the third picking-needle area.

The present invention further provides a knitting method for the sock, and the knitting method uses a circular knitting technology or a weft knitting technology. The knitting method includes a knitting stage of knitting a sock heel, and the stage includes:

step 11: knitting a first picking-needle area;

step 12: knitting a first inserting-picking-needle area:

(a) knitting a second inserting-needle area at an end of the first picking-needle area, knitting the second inserting-needle area to link the first picking-needle area, then knitting a second picking-needle area at a side of the second inserting-needle area, and knitting the second picking-needle area to link the first picking-needle area; and

(b) knitting a plurality of first inserting-picking-needle areas in turn, and knitting each first inserting-picking-needle area to link the first picking-needle area; and

Step 13: knitting a first inserting-needle area, knitting the first inserting-needle area to link a last second inserting-needle area and the second picking-needle area in step 12, and knitting the first inserting-needle area to link the first picking-needle area.

A further improvement of the present invention is that, further includes, knitting a first adding inserting-needle area at one side of the first picking-needle area away from a sock toe before knitting the first picking-needle area, and the first adding inserting-needle area may link the first picking-needle area.

A further improvement of the present invention is that, further includes, knitting an adding picking-needle area at one side of the first inserting-needle area near the sock toe after knitting the first inserting-needle area, and the adding picking-needle area may link the first inserting-needle area.

A further improvement of the present invention is that, the knitting method further includes a knitting stage of knitting a sock toe, and the stage includes:

step 14: knitting a third picking-needle area;

step 15: knitting a second inserting-picking-needle area:

(c) knitting a fourth inserting-needle area at an end of the third picking-needle area, knitting the fourth inserting-needle area to link the third picking-needle area, then knitting a fourth picking-needle area at a side of the fourth inserting-needle area, and knitting the fourth picking-needle area to link the third picking-needle area; and

(d) knitting a plurality of second inserting-picking-needle areas in turn, and knitting each second inserting-picking-needle area to link the third picking-needle area; and step 16: knitting a third inserting-needle area, knitting the third inserting-needle area to link a last fourth inserting-needle area and the fourth picking-needle area in step 15, and knitting the third inserting-needle area to link the third picking-needle area.

A further improvement of the present invention is that, further includes, knitting a second adding inserting-needle area at one side of the third picking-needle area near a sock heel before knitting the third picking-needle area, and the second adding inserting-needle area may link the third picking-needle area.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic diagram of a sock of the present invention;

FIG. 2 is a schematic diagram and expanded diagram of a preferable Embodiment I of a sock heel of the present invention;

FIG. 3 is a schematic diagram and expanded diagram of a preferable Embodiment II of a sock heel of the present invention;

FIG. 4 is a schematic diagram and expanded diagram of a preferable Embodiment III of a sock heel of the present invention;

FIG. 5 is a schematic diagram and expanded diagram of a preferable Embodiment IV of a sock heel of the present invention;

FIG. 6 is a schematic diagram and expanded diagram of a preferable Embodiment I of a sock toe of the present invention; and

FIG. 7 is a schematic diagram and expanded diagram of a preferable Embodiment II of a sock toe of the present invention.

The reference numerals in the figures are:

D1 first picking-needle area; I1 first inserting-needle area; A1 first inserting-picking-needle area; B1 first adding inserting-needle area; C1 adding picking-needle area; D2 second picking-needle area; I2 second inserting-needle area; D3 third picking-needle area; I3 third inserting-needle area; A2 second inserting-picking-needle area; B2 first adding inserting-needle area; D4 fourth picking-needle area; and I4 fourth inserting-needle area.

DETAILED DESCRIPTION OF THE INVENTION

The present invention will be described in detail below combining with the accompanying drawings.

Please refer to FIG. 1. An embodiment of the present invention provides a comfortable anti-off sock, and the sock uses a circular knitting technology or a weft knitting technology. Its structure includes: a sock toe 11, a sock body 12 and a sock heel 13; and both the sock toe 11 and the sock heel 13 are connected with the sock body 12.

See the expanded diagram FIG. 2, wherein the sock heel 13 includes a first picking-needle area D1 and a first inserting-needle area I1. The first inserting-needle area I1 is located at one side of the first picking-needle area D1 toward the sock toe 11, that is at the front of the first picking-needle area D1. The first picking-needle area D1 exhibits a trapezoid eeff with a decreased loop toward the direction of the sock sole, and the first inserting-needle area I1 exhibits a trapezoidal sse′e′ shape with an increased loop away from the direction of the sock sole. Part of the first picking-needle area D1 links the first inserting-needle area I1, a plurality of first inserting-picking-needle areas A1 are knitted between the first picking-needle area D1 and the first inserting-needle area I1, and the number is greater than or equal to 2.

Each first inserting-picking-needle area A1 includes a second inserting-needle area I2 and a second picking-needle area D2. The second picking-needle area D2 exhibits a trapezoidal hhjj shape with a decreased loop toward the direction of the sock sole, and the second inserting-needle area I2 exhibits a trapezoidal ffhh shape with an increased loop toward the direction of the sock toe. The end of the second inserting-needle area I2 links the end of the first picking-needle area D1, and the second picking-needle area D2 knitted at a side of the second inserting-needle area I2 links the first picking-needle area D1. Then continue to knit a second first inserting-picking-needle area A1 exhibited a trapezoidal jjkk shape with a decreased loop toward the direction of the sock sole. And so on, the second picking-needle area D2 of a last first inserting-picking-needle area A1 forms a trapezoidal shape rrss, the second inserting-needle area I2 forms a wwrr shape, and the second picking-needle area D2 of the last first inserting-picking-needle area A1 links the first inserting-needle area I1. The above gore lines formed at the sock heel include a main gore line of and side gore lines hj . . . rs and so on, wherein the omitted side gore lines are formed by a plurality of first inserting-picking-needle areas A1. The length of the side gore lines hj . . . rs can be equal or unequal, and the spacing distances of the side gore lines hj . . . rs on the main gore line are not limited.

Please refer to FIG. 3(1) and FIG. 3(2). Preferably, the sock heel 13 further includes a first adding inserting-needle area B1. The first adding inserting-needle area B1 exhibited a trapezoidal eevv shape with an increased loop toward the direction of the sock sole links the first picking-needle area D1 to form the gore line ev.

Please refer to FIG. 4(1) and FIG. 4(2). Preferably, the sock heel 13 further includes an adding picking-needle area C1. See the expanded diagram, the adding picking-needle area C1 exhibited a trapezoidal e′e′uu shape with a decreased loop toward the direction of the sock sole links the first inserting-needle area I1 to form the gore line e′u (e′ point is aligned with the e point).

Please refer to FIG. 5(1) and FIG. 5(2). Preferably, the sock heel 13 further includes the first adding inserting-needle area B1. The first adding inserting-needle area B1 exhibited the trapezoidal eevv shape with the increased loop toward the direction of the sock sole links the first picking-needle area D1 to form the gore line ev. And the adding picking-needle area C1 exhibited a trapezoidal e′e′uu shape with the decreased loop toward the direction of the sock sole links the first inserting-needle area I1 to form the gore line e′u (e′ point is aligned with the e point).

See FIG. 6(1) and FIG. 6(2), the sock toe 11 of the sock includes a third picking-needle area D3 and a third inserting-needle area I3, and the third inserting-needle area I3 is located at one side of the third picking-needle area D3 toward the sock heel 13, that is at the front of the third picking-needle area D3. The third picking-needle area D3 exhibits a trapezoid EEFF with a decreased loop away from the direction of the sock heel 13, and the third inserting-needle area I3 exhibits a trapezoidal SSE′E′ shape with an increased loop toward the direction of the sock heel. Part of the third picking-needle area D3 links the third inserting-needle area I3, a plurality of second inserting-picking-needle areas A2 are knitted between the third picking-needle area D3 and the third inserting-needle area I3, and the number is greater than or equal to 2.

Each second inserting-picking-needle area A2 includes a fourth inserting-needle area I4 and a fourth picking-needle area D4. The fourth picking-needle area D4 exhibits a trapezoidal HHJJ shape with a decreased loop toward the direction of the sock sole, and the fourth inserting-needle area I4 exhibits a trapezoidal FFHH shape with an increased loop toward the direction of the sock sole. The end of the fourth inserting-needle area I4 links the end of the third picking-needle area D3, and the fourth picking-needle area D4 knitted at a side of the fourth inserting-needle area I4 links the third picking-needle area D3. Then continue to knit a second inserting-picking-needle area A2 exhibited a trapezoidal JJKK shape with an increased loop toward the direction of the sock sole. And so on, the fourth picking-needle area D4 of a last second inserting-picking-needle area A2 forms a trapezoidal shape RRSS, the fourth inserting-needle area I4 forms a WWRR shape, and the fourth picking-needle area D4 of the last second inserting-picking-needle area A2 links the third inserting-needle area I3. The above gore lines formed at the sock toe include a main gore line EF and side gore lines HJ . . . RS and so on, wherein the omitted gore lines are formed by a plurality of second inserting-picking-needle areas A2. The length of the side gore lines HJ . . . RS can be equal or unequal, and the spacing distances of the side gore line HJ . . . RS on the main gore line are not limited.

Please refer to FIG. 7(1) and FIG. 7(2). Preferably, the sock toe 11 further includes a second adding inserting-needle area B2. The second adding inserting-needle area B2 exhibited a trapezoidal EEVV shape with an increased loop toward the direction of the sock sole links the third picking-needle area D3 to form the gore line EV (E′ point is aligned with the E point)

The present invention further provides a knitting method for the sock, and the knitting method uses a circular knitting technology or a weft knitting technology. The knitting method includes a knitting stage of knitting a sock heel, and the stage includes following steps:

First, taking e point as a start point, start to knit the first picking-needle area D1 away from the direction of the sock toe 11 to form a line segment of the main gore line ef. Then taking f as the start point, start to knit the first inserting-picking-needle area A1, and the knitting stage of the first inserting-picking-needle area A1 starts from f Knit the second inserting-needle area I2 at a side of the line segment of the main gore line of along the opposite direction of the main gore line ef. After knitting at h point, taking h point as the start point, knit the second picking-needle area D2 toward the direction of the sock sole to j point to form the first side gore line hj. Then taking j point as the start point, continue to knit the second inserting-needle area I2 to point k, and so on, until the last side gore line rs is formed. Then taking s point as the start point, knit the first inserting-needle area I1 to e′ point, and the e′ point is aligned with the e point. The first inserting-needle area I1 formed by knitting links the first picking-needle area D1.

Preferably, the knitting stage of knitting the sock heel further includes knitting a first adding inserting-needle area B1. Before knitting the first picking-needle area D1, taking v point as the start point, knit the first adding inserting-needle area B1 to end point e point at one side of the first picking-needle area D1 away from the sock toe 11 to form a line segment of the gore line ye.

Preferably, the knitting stage of knitting the sock heel further includes an adding picking-needle area C1. After knitting the first inserting-needle area I1, taking e′ point (e′ point is aligned with e point) as the start point, knit the adding picking-needle area C1 to end point u point at one side of the first inserting-needle area I1 toward the sock toe 11 to form a line segment of gore line e′u.

Preferably, the knitting stage of knitting the sock heel further includes the first adding inserting-needle area B1. Before knitting the first picking-needle area D1, taking v point as the start point, knit the first adding inserting-needle area B1 to end point e point at one side of the first picking-needle area D1 away from the sock toe 11 to form the line segment of gore line ye. And after knitting the first inserting-needle area I1, taking e′ point (e′ point is aligned with the e point) as the start point, knit the adding picking-needle area C1 to the end point u point at one side of the first inserting-needle area I1 toward the sock toe 11 to form the line segment of gore line e′u.

The knitting method further includes knitting the sock toe. First, taking E point as the start point, start to knit the third picking-needle area D3 away from the direction of the sock heel 13 to form a line segment of main gore line EF. Then taking F point as the start point, start to knit the second inserting-picking-needle area A2, and the knitting stage of the second inserting-picking-needle area A2 starts from F point. Knit a fourth inserting-needle area I4 at a side of the line segment of the main gore line EF along the opposite direction of the main gore line EF. After knitting to H point, taking H point as the start point, knit the fourth picking-needle area D4 toward the direction of the sock sole to J point to form the first side gore line HJ. Then taking J as the start point, continue to knit the fourth inserting-needle area I4 to point K, and so on, until the last side gore line RS is formed. Then taking S point as the start point, knit the third inserting-needle area I3 to E′ point, and the E′ point is aligned with the E point. The third inserting-needle area I3 formed by knitting links the third picking-needle area D3.

Preferably, the knitting stage of knitting the sock toe further includes a second adding inserting-needle area B2. Before knitting the third picking-needle area D3, taking V point as the start point, knit the second adding inserting-needle area B2 to end point E point at one side of the third picking-needle area D3 toward the sock heel 13 to form a line segment of gore line VE.

A plurality of first inserting-picking-needle areas are located between the first picking-needle area and the first inserting-needle linking to each other, and each first inserting-picking-needle area links the first picking-needle area. The present invention can increase the loop-forming number of the sole, increase the stretch size of the sole without affecting the size of the foot surface, and have no protrusion after setting, which can effectively improve the wrapping performance and comfort of the sock, and can be used in various kinds of socks such as a low cut sock, middle invisible sock, commercial sock, athletic sock and so on.

Although the present invention has been described in considerable detail with reference to certain preferred embodiments thereof, the disclosure is not for limiting the scope of the invention. Persons having ordinary skill in the art may make various modifications and changes without departing from the scope and spirit of the invention. Therefore, the scope of the appended claims should not be limited to the description of the preferred embodiments described above. 

What is claimed is:
 1. A comfortable anti-off sock, using a circular knitting technology or a weft knitting technology, comprising: a sock toe, a sock body and a sock heel; both the sock toe and the sock heel being connected with the sock body; wherein the sock heel comprises a first picking-needle area and a first inserting-needle area located at one side of the first picking-needle area near the sock toe, the first picking-needle area links the first inserting-needle area, and a plurality of first inserting-picking-needle areas are located between the first inserting-needle area and the first picking-needle area; and wherein the first inserting-picking-needle area comprises a second inserting-needle area located at an end of the first picking-needle area and a second picking-needle area located at a side of the second inserting-needle area, both the second picking-needle area and the second inserting-needle area link the first picking-needle area, and the second picking-needle area and the second inserting-needle area in a last first inserting-picking-needle area link the first inserting-needle area.
 2. The comfortable anti-off sock according to claim 1, the sock heel further comprising a first adding inserting-needle area located at one side of the first picking-needle area away from the sock toe, and the first adding inserting-needle area linking the first picking-needle area.
 3. The comfortable anti-off sock according to claim 1, the sock heel further comprising an adding picking-needle area located at one side of the first inserting-needle area near the sock toe, and the adding picking-needle area linking the first inserting-needle area.
 4. The comfortable anti-off sock according to claim 2, the sock heel further comprising an adding picking-needle area located at one side of the first inserting-needle area near the sock toe, and the adding picking-needle area linking the first inserting-needle area.
 5. The comfortable anti-off sock according to claim 1, wherein the sock toe comprises a third picking-needle area and a third inserting-needle area located at one side of the third picking-needle area near the sock heel, and a plurality of second inserting-picking-needle areas are located between the third inserting-needle area and the third picking-needle area; and wherein the second inserting-picking-needle area comprises a fourth inserting-needle area located at an end of the third picking-needle area and a fourth picking-needle area located at a side of the fourth inserting-needle area, both the fourth picking-needle area and the fourth inserting-needle area link the third picking-needle area, and the fourth picking-needle area and the fourth inserting-needle area in a last second inserting-picking-needle area link the third inserting-needle area.
 6. The comfortable anti-off sock according to claim 5, the sock toe further comprising a second adding inserting-needle area located at one side of the third picking-needle area near the sock heel, and the second adding inserting-needle area linking the third picking-needle area.
 7. A knitting method for the sock according to claim 1, the knitting method using a circular knitting technology or a weft knitting technology, the knitting method comprising a knitting stage of knitting a sock heel, and the stage comprising: step 11: knitting a first picking-needle area; step 12: knitting a first inserting-picking-needle area: (a) knitting a second inserting-needle area at an end of the first picking-needle area, knitting the second inserting-needle area to link the first picking-needle area, then knitting a second picking-needle area at a side of the second inserting-needle area, and knitting the second picking-needle area to link the first picking-needle area; and (b) knitting a plurality of first inserting-picking-needle areas in turn, and knitting each first inserting-picking-needle area to link the first picking-needle area; and Step 13: knitting a first inserting-needle area, knitting the first inserting-needle area to link a last second inserting-needle area and the second picking-needle area in step 12, and knitting the first inserting-needle area to link the first picking-needle area.
 8. The knitting method for the sock according to claim 7, further comprising, knitting a first adding inserting-needle area at one side of the first picking-needle area away from a sock toe before knitting the first picking-needle area, and the first adding inserting-needle area linking the first picking-needle area.
 9. The knitting method for the sock according to claim 7, further comprising, knitting an adding picking-needle area at one side of the first inserting-needle area near the sock toe after knitting the first inserting-needle area, and the adding picking-needle area linking the first inserting-needle area.
 10. The knitting method for the sock according to claim 8, further comprising, knitting an adding picking-needle area at one side of the first inserting-needle area near the sock toe after knitting the first inserting-needle area, and the adding picking-needle area linking the first inserting-needle area.
 11. The knitting method for the sock according to claim 7, further comprising a knitting stage of knitting a sock toe, and the stage comprising: step 14: knitting a third picking-needle area; step 15: knitting a second inserting-picking-needle area: (c) knitting a fourth inserting-needle area at an end of the third picking-needle area, knitting the fourth inserting-needle area to link the third picking-needle area, then knitting a fourth picking-needle area at a side of the fourth inserting-needle area, and knitting the fourth picking-needle area to link the third picking-needle area; and (d) knitting a plurality of second inserting-picking-needle areas in turn, and knitting each second inserting-picking-needle area to link the third picking-needle area; and step 16: knitting a third inserting-needle area, knitting the third inserting-needle area to link a last fourth inserting-needle area and the fourth picking-needle area in step 15, and knitting the third inserting-needle area to link the third picking-needle area.
 12. The knitting method for the sock according to claim 11, further comprising, knitting a second adding inserting-needle area at one side of the third picking-needle area near a sock heel before knitting the third picking-needle area, and the second adding inserting-needle area linking the third picking-needle area.
 13. A knitting method for the sock according to claim 2, the knitting method using a circular knitting technology or a weft knitting technology, the knitting method comprising a knitting stage of knitting a sock heel, and the stage comprising: step 11: knitting a first picking-needle area; step 12: knitting a first inserting-picking-needle area: (a) knitting a second inserting-needle area at an end of the first picking-needle area, knitting the second inserting-needle area to link the first picking-needle area, then knitting a second picking-needle area at a side of the second inserting-needle area, and knitting the second picking-needle area to link the first picking-needle area; and (b) knitting a plurality of first inserting-picking-needle areas in turn, and knitting each first inserting-picking-needle area to link the first picking-needle area; and Step 13: knitting a first inserting-needle area, knitting the first inserting-needle area to link a last second inserting-needle area and the second picking-needle area in step 12, and knitting the first inserting-needle area to link the first picking-needle area.
 14. A knitting method for the sock according to claim 3, the knitting method using a circular knitting technology or a weft knitting technology, the knitting method comprising a knitting stage of knitting a sock heel, and the stage comprising: step 11: knitting a first picking-needle area; step 12: knitting a first inserting-picking-needle area: (a) knitting a second inserting-needle area at an end of the first picking-needle area, knitting the second inserting-needle area to link the first picking-needle area, then knitting a second picking-needle area at a side of the second inserting-needle area, and knitting the second picking-needle area to link the first picking-needle area; and (b) knitting a plurality of first inserting-picking-needle areas in turn, and knitting each first inserting-picking-needle area to link the first picking-needle area; and Step 13: knitting a first inserting-needle area, knitting the first inserting-needle area to link a last second inserting-needle area and the second picking-needle area in step 12, and knitting the first inserting-needle area to link the first picking-needle area.
 15. A knitting method for the sock according to claim 4, the knitting method using a circular knitting technology or a weft knitting technology, the knitting method comprising a knitting stage of knitting a sock heel, and the stage comprising: step 11: knitting a first picking-needle area; step 12: knitting a first inserting-picking-needle area: (a) knitting a second inserting-needle area at an end of the first picking-needle area, knitting the second inserting-needle area to link the first picking-needle area, then knitting a second picking-needle area at a side of the second inserting-needle area, and knitting the second picking-needle area to link the first picking-needle area; and (b) knitting a plurality of first inserting-picking-needle areas in turn, and knitting each first inserting-picking-needle area to link the first picking-needle area; and Step 13: knitting a first inserting-needle area, knitting the first inserting-needle area to link a last second inserting-needle area and the second picking-needle area in step 12, and knitting the first inserting-needle area to link the first picking-needle area.
 16. A knitting method for the sock according to claim 5, the knitting method using a circular knitting technology or a weft knitting technology, the knitting method comprising a knitting stage of knitting a sock heel, and the stage comprising: step 11: knitting a first picking-needle area; step 12: knitting a first inserting-picking-needle area: (a) knitting a second inserting-needle area at an end of the first picking-needle area, knitting the second inserting-needle area to link the first picking-needle area, then knitting a second picking-needle area at a side of the second inserting-needle area, and knitting the second picking-needle area to link the first picking-needle area; and (b) knitting a plurality of first inserting-picking-needle areas in turn, and knitting each first inserting-picking-needle area to link the first picking-needle area; and Step 13: knitting a first inserting-needle area, knitting the first inserting-needle area to link a last second inserting-needle area and the second picking-needle area in step 12, and knitting the first inserting-needle area to link the first picking-needle area.
 17. A knitting method for the sock according to claim 6, the knitting method using a circular knitting technology or a weft knitting technology, the knitting method comprising a knitting stage of knitting a sock heel, and the stage comprising: step 11: knitting a first picking-needle area; step 12: knitting a first inserting-picking-needle area: (a) knitting a second inserting-needle area at an end of the first picking-needle area, knitting the second inserting-needle area to link the first picking-needle area, then knitting a second picking-needle area at a side of the second inserting-needle area, and knitting the second picking-needle area to link the first picking-needle area; and (b) knitting a plurality of first inserting-picking-needle areas in turn, and knitting each first inserting-picking-needle area to link the first picking-needle area; and Step 13: knitting a first inserting-needle area, knitting the first inserting-needle area to link a last second inserting-needle area and the second picking-needle area in step 12, and knitting the first inserting-needle area to link the first picking-needle area. 